Device for retaining heat in locomotive-boilers



Patented July l2, I398.

P. MILLER. I DEVICE FOR RETAINING HEAT IN LOCOMOTIVE BOILERS.

(Application filed Aug. 20, 1897.)

(No Model.)

\i w i w V jzvmgm t? 7 at 121 7 f I [jjf 1 lanti, county of VVashtenaw,and State of IINiTEn STATEs ATEN'I PETER MILLER, OF YPSILANTI, MICHIGAN.

DEVICE FOR RETAINING HEAT IN LOCOMOTIVE-BOILERS.

SPECIFICATION forming part of Letters Patent No. 607,066, dated July 12,1898.

Appl cation filed August 2 0, 1 8 9 7- To all whom it may concern:

Be it known that I, PETER MILLER, of Ypsi- Michigan, have inventedcertain new and useful Improvements in a Device for Retaining Heat inLocomotive-Boilers; and I do hereby declare that the following is afull, clear, and exact description of the invention, which will enableothers skilled in the art to which it appertains to make and use thesame, reference being had to the accompanying drawings, and to thefigures of reference marked thereon, which form part of thisspecification.

My invention relates to a device for retaining heat inlocomotive-boilers, and has for its object to provide suitable platesand screens adapted to be secured in the smoke-box of thelocomotive-boiler, whereby the heat is retained and a more perfectcombustion established.

A further object is to adapt aplate for granulation of the sparkseducted by the force of the exhaust.

In the drawings, Figure 1 is an elevation ofmydeviceappliedtoalocomotive-boiler. Fig. 2 is a longitudinal verticalsection through the smoke-box of the boiler and partially through theflues. Fig. 3 is a plan view showing the granulating fingers orprojections of the heat-retaining plate. Fig. 4 is a section through thesame on lines :10 m.

In carrying out my invention the heat-retaining plate 1 is secured tothe front end of the smoke-box 2, being preferably level with the toprow of flues 3. The under side of the plate 1 is serrated or roughenedby projecting logs or fingers 4. Upon the inner end of the plate andintegral with the bodyis a flange 5 for securing thereto a foraminousmetal plate or screen 6, which is also secured by suitable means to thebathe-plate 7.

S designates an exhaust-nozzle, which is in vertical alinement with theflared end of the smoke-pipe 9. The front portion of the plate 1 issecured to the cover 10 by bolts engaging lugs 11, and the plate issupported in its position in the smoke-box by flanges 12 integral withthe plate.

In operation the heat passing through the flues 3 outwardly toward thesmoke-stack is retained by the plate 1, causing a cushion of Serial No.648,866. (Noinodeh) air to exert a back pressure within the fiues andcombustion-chamber of the boiler. The result of such retention or backpressure is to more fully intermingle the combustible gases with theoxygen contained within the atmosphere, thereby causing a perfectcombustion within the fines and combustionchambers of the boiler andalso greatly reducing the consumption of fuel. The force of exhaust ineducting the cinders or sparks from the flues will force them againstthe retaining-plate 1, thereby grauulating the sparks into fineparticles and they are then educted through the smoke-stack as finedust.

It will be seen that all of the live cinders or sparks come in contactwith the retainingplate and are granulated, passing out through thesmoke-stack in dust-like form and dead as they reach the atmosphere,thereby preventing any cause of fire from live cinders or sparks.

The life of the screen is also increased by the action of the plate 1 inretaining the heated sparks and is prevented from burning out by a plate1 being in the direct path of travel of the heated gases.

For the purpose of repairing within the smoke-box of the boiler behindthe screen I have provided a detachable screen 13, centrally located andwhich is secured to the main section by bolts 14.

What I claim is In a locomotive-boiler, a horizontal flangedheat-retaining plate provided upon its under side with lugs, and securedat one end to the cover 10, the inclined screen .secured to the oppositeend of the plate, an oppositely-inclined baffle-plate secured to thescreen,an exhaust-nozzle vertically located in the smokebox, asmoke-pipe located over and in alinement with the nozzle, and a boilerprovided with flues arranged adjacent to the smokepipe and nozzle, allarranged and operated as and for the purpose set forth.

In testimony that I claim the foregoing as my own I hereby affix mysignature in presence of two witnesses.

PETER MILLER.

IVitnesses:

JEAN A. PARRE, H. II. MARTIN.

